FURNACE SPECIFICATIONS
1. These furnaces are manufactured for natural gas operation. Optional LP Conversion Kits are available to convert to
propane gas.
2. For elevations above 2000 ft. the rating should be reduced by 4% for each 1000 ft. above sea level. The furnace must not
be derated, orifice changes should only be made if necessary for altitude.
3. The total heat loss from the structure as expressed in TOTAL BTU/HR must be calculated by the manufactures method
of in accordance with the "A.S.H.R.A.E. GUIDE" or "MANUAL J-LOAD CALCULATIONS" published by the AIR CON-
DITIONING CONTRACTORS OF AMERICA. The total heat loss calculated should be equal to or less than the heating
capacity. Output based on D.O.E. test procedures, steady state efficiency times output.
4. Minimum Circuit Ampacity calculated as: (1.25 x Circulator Blower Amps) + I.D. Blower Amps.
22
Rev. 2
* Off Heating - This fan delay timing is adjustable (60, 90, 120, 180 seconds). 90 seconds as shipped.
MODEL
GUIS070CA35
GUIS070CX35
GUIS070DA35
GUIS070DX35
GUIS090CA30
GUIS090DA30
GUIS090DX30
GUIS090CA50
GUIS090CX50
GUIS090DA50
GUIS090DX50
GUIS115CA50
GUIS115DA50
GUIS115DX50
GUIS140CA50
GUIS140DA50
GCIS070CX35
GCIS070DX35
GCIS090CX50
GCIS090DX50
Btuh Input (US) High Fire
69,000
92,000
92,000
115,000
138,000
69,000
92,000
Output (US) High Fire
55,200
73,600
73,600
92,000
110,400
55,200
73,600
Btuh Input (US) Low Fire
48,000
64,000
64,000
80,000
96,000
48,000
64,000
Output (US) Low Fire
38,400
51,200
51,200
64,000
76,800
38,400
51,200
A.F.U.E.
80%
80%
80%
80%
80%
80%
80%
Rated External Static (WC)
.12 - .50
.15 - .50
.15 - .50
.20 - .50
.20 - .50
.12 - .50
.15 - .50
Temperature Rise °F
30 - 60
35 - 65
35 - 65
35 - 65
45 - 75
35 - 65
45 - 75
High Pressure Switch Trip Point
-0.80
-0.74
-0.74
-0.66
-0.66
-0.55
-0.55
Low Pressure Switch Trip Point
-0.45
-0.37
-0.37
-0.37
-0.32
-0.27
-0.27
Blower Wheel (D x W)"
10 X 6
10 X 8
10 X 8
10 X 9
10 X 9
10 X 6
10 X 8
Blower Horsepower
1/2
1/2
1/2
3/4
3/4
1/2
3/4
Blower Speeds
4
4
4
4
4
4
4
Max CFM @ 0.5 E.S.P.
1450
1380
1975
1985
2050
1366
1780
Power Supply
115-60-1
115-60-1
115-60-1
115-60-1
115-60-1
115-60-1
115-60-1
Min. Circuit Ampacity (MCA)
10.9
8.0
14.8
13.3
14.3
10.2
14.2
Max. Overcurrent Device
15
15
15
15
15
15
15
Transformer (VA)
40
40
40
40
40
40
40
Heat Anticipator
0.7
0.7
0.7
0.7
0.7
0.7
0.7
Limit Setting °F
230
220
170
190
160
190
160
Aux. Limit °F.
160
160
160
160
160
160
160
Fan Delay On
30 secs.
30 secs.
30 secs.
30 secs.
30 secs.
30 secs.
30 secs.
Off Heating *
90 secs.
90 secs.
90 secs.
90 secs.
90 secs.
90 secs.
90 secs.
Off Cooling
45 secs.
45 secs.
45 secs.
45 secs.
45 secs.
45 secs.
45 secs.
Gas Supply Pressure (Nat/LP)
7" / 11"
7" / 11"
7" / 11"
7" / 11"
7" / 11"
7" / 11"
7" / 11"
Manifold Pressure (Nat/LP) High Stage
3.5 " / 10"
3.5 " / 10"
3.5 " / 10"
3.5 " / 10"
3.5 " / 10"
3.5 " / 10"
3.5 " / 10"
Manifold Pressure (Nat/LP) Low Stage
1.9" / 6.0"
1.9" / 6.0"
1.9" / 6.0"
1.9" / 6.0"
1.9" / 6.0"
1.9" / 6.0"
1.9" / 6.0"
Orifice Size (Nat/LP)
#43 / #55
#43 / #55
#43 / #55
#43 / #55
#43 / #55
#43 / #55
#43 / #55
Number of Burners
3
4
4
5
6
3
4
Vent Connector Diameter
4"
4"
4"
4"
4"
3"
3"
Shipping Weight (lbs.)
152
169
178
194
198
152
178
